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Description

TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution

PUBLISHED Reserved 2026-04-02 | Published 2026-04-30 | Updated 2026-05-01 | Assigner GitLab




HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Problem types

CWE-122: Heap-based Buffer Overflow

Product status

Default status
unaffected

4.6.0 (semver) before 4.6.5
affected

Credits

Duc Anh Nguyen finder

References

www.wireshark.org/security/wnpa-sec-2026-14.html

gitlab.com/wireshark/wireshark/-/issues/21090 (GitLab Issue #21090) issue-tracking permissions-required

cve.org (CVE-2026-5402)

nvd.nist.gov (CVE-2026-5402)

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